Product Description
MAHLE HS54580C is an OE-quality upper head gasket set (head set) for the 2011–2016 GM 6.6L Duramax LML. It includes the critical upper-engine gaskets and seals needed when servicing cylinder heads. Head gaskets and head bolts are not included.
- Kit type: Upper Gasket/Head Set (HS)
- MPN: HS54580C • GTIN/UPC: 027067004062
- Meets or exceeds OE specifications
- Includes valve stem seals
- Warranty: 1-Year Limited
Fitment
- 2011–2016 Chevrolet Silverado 2500HD / 3500HD with 6.6L Duramax LML
- 2011–2016 GMC Sierra 2500HD / 3500HD with 6.6L Duramax LML
Cross Reference / Related Parts
- OEM Interchange: 98403365, 98434773
- Pair with MAHLE cylinder head gaskets (sold separately): 5458X / 5459X in Grade A/B/C thicknesses as required
What’s Included
Upper engine gaskets and seals required for cylinder head service (intake/exhaust manifold, injector seals, valve cover, valve stem seals, etc.). Head gaskets and head bolts are sold separately.
FAQ
Does this kit include the head gaskets?
No—HS54580C is an upper gasket set; head gaskets are not included and must be purchased separately.
Which Duramax engines does it fit?
It is designed for 2011–2016 GM 6.6L Duramax LML trucks (Silverado/Sierra 2500HD/3500HD).
Are head bolts included?
No—head bolts/studs are not included. Add new bolts or performance studs during reassembly.
What head gaskets should I use with this kit?
Use MAHLE 5458X/5459X in the correct grade (A/B/C) and thickness to match factory specification or measured protrusion.
